For Linux/gnu compatibility, preinclude <stdc-predef.h> if the file is available

As reported in llvm bugzilla 32377.
Here’s a patch to add preinclude of stdc-predef.h.

The gcc documentation says “On GNU/Linux, <stdc-predef.h> is pre-included.” 
See https://gcc.gnu.org/gcc-4.8/porting_to.html;

The preinclude is inhibited with –ffreestanding.

Basically I fixed the failing test cases by adding –ffreestanding which inhibits
this behavior.

I fixed all the failing tests, including some in extra/test, there's a separate
patch for that which is linked here

Patch By: mibintc

Differential Revision: https://reviews.llvm.org/D34158

llvm-svn: 318669

4 files changed, 5 insertions, 4 deletions

diff --git a/clang/test/Driver/crash-report-header.h b/clang/test/Driver/crash-report-header.h
index e0193cbe45e..97dcdf9348b 100644
--- a/clang/test/Driver/crash-report-header.h
+++ b/clang/test/Driver/crash-report-header.h
@@ -1,6 +1,6 @@
 // RUN: rm -rf %t
 // RUN: mkdir %t
-// RUN: not env TMPDIR="%t" TEMP="%t" TMP="%t" RC_DEBUG_OPTIONS=1 %clang -fsyntax-only %s 2>&1 | FileCheck %s
+// RUN: not env TMPDIR="%t" TEMP="%t" TMP="%t" RC_DEBUG_OPTIONS=1 %clang -ffreestanding -fsyntax-only %s 2>&1 | FileCheck %s
 // RUN: cat %t/crash-report-header-*.h | FileCheck --check-prefix=CHECKSRC "%s"
 // RUN: cat %t/crash-report-header-*.sh | FileCheck --check-prefix=CHECKSH "%s"
 // REQUIRES: crash-recovery
diff --git a/clang/test/Driver/crash-report-spaces.c b/clang/test/Driver/crash-report-spaces.c
index 3e95a0de251..8433884ff95 100644
--- a/clang/test/Driver/crash-report-spaces.c
+++ b/clang/test/Driver/crash-report-spaces.c
@@ -1,7 +1,7 @@
 // RUN: rm -rf "%t"
 // RUN: mkdir "%t"
 // RUN: cp "%s" "%t/crash report spaces.c"
-// RUN: not env TMPDIR="%t" TEMP="%t" TMP="%t" RC_DEBUG_OPTIONS=1 %clang -fsyntax-only "%t/crash report spaces.c" 2>&1 | FileCheck "%s"
+// RUN: not env TMPDIR="%t" TEMP="%t" TMP="%t" RC_DEBUG_OPTIONS=1 %clang -ffreestanding -fsyntax-only "%t/crash report spaces.c" 2>&1 | FileCheck "%s"
 // RUN: cat "%t/crash report spaces"-*.c | FileCheck --check-prefix=CHECKSRC "%s"
 // RUN: cat "%t/crash report spaces"-*.sh | FileCheck --check-prefix=CHECKSH "%s"
 // REQUIRES: crash-recovery
diff --git a/clang/test/Driver/crash-report.c b/clang/test/Driver/crash-report.c
index a3f1f9e72a5..af7b245e626 100644
--- a/clang/test/Driver/crash-report.c
+++ b/clang/test/Driver/crash-report.c
@@ -2,7 +2,7 @@
 // RUN: mkdir %t
 // RUN: not env TMPDIR=%t TEMP=%t TMP=%t RC_DEBUG_OPTIONS=1              \
 // RUN:  CC_PRINT_HEADERS=1 CC_LOG_DIAGNOSTICS=1                         \
-// RUN:  %clang -fsyntax-only %s                                         \
+// RUN:  %clang -fsyntax-only -ffreestanding %s                          \
 // RUN:  -F/tmp/ -I /tmp/ -idirafter /tmp/ -iquote /tmp/ -isystem /tmp/  \
 // RUN:  -iprefix /the/prefix -iwithprefix /tmp -iwithprefixbefore /tmp/ \
 // RUN:  -Xclang -internal-isystem -Xclang /tmp/                         \
@@ -42,5 +42,6 @@ FOO
 // CHECKSH-NOT: "-iwithprefixbefore" "/tmp/"
 // CHECKSH-NOT: "-internal-isystem" "/tmp/"
 // CHECKSH-NOT: "-internal-externc-isystem" "/tmp/"
+// CHECKSH-NOT: "-fsystem-include-if-exists" "/tmp/"
 // CHECKSH-NOT: "-dwarf-debug-flags"
 // CHECKSH: "crash-report-{{[^ ]*}}.c"
diff --git a/clang/test/Driver/rewrite-map-in-diagnostics.c b/clang/test/Driver/rewrite-map-in-diagnostics.c
index 4aea0ec0314..cb08830ef2f 100644
--- a/clang/test/Driver/rewrite-map-in-diagnostics.c
+++ b/clang/test/Driver/rewrite-map-in-diagnostics.c
@@ -1,7 +1,7 @@
 // RUN: rm -rf "%t"
 // RUN: mkdir -p "%t"
 // RUN: not env TMPDIR="%t" TEMP="%t" TMP="%t" RC_DEBUG_OPTION=1 \
-// RUN:     %clang -fsyntax-only -frewrite-map-file %p/Inputs/rewrite.map %s 2>&1 \
+// RUN:     %clang -ffreestanding -fsyntax-only -frewrite-map-file %p/Inputs/rewrite.map %s 2>&1 \
 // RUN:   | FileCheck %s
 
 #pragma clang __debug parser_crash